Perovskite solar cells(PSCs)have been receiving attention for photovoltaic advantages of high-power conversion efficiency,cost-effectiveness,and easy fabrication process.Particularly,flexible PSCs(FPSCs)are considered...Perovskite solar cells(PSCs)have been receiving attention for photovoltaic advantages of high-power conversion efficiency,cost-effectiveness,and easy fabrication process.Particularly,flexible PSCs(FPSCs)are considered to be promising renewable power sources due to the positive potential of flexible and lightweight properties.However,FPSCs tend to have lower efficiency compared to glass-based rigid PSCs(RPSCs).The main issue is high refractive index of polymer substrates such as polyethylene naphthalate(PEN),used for FPSCs,thereby reducing the external light absorption efficiency.In this study,we developed glasswing inspired sticker-type multilayer anti-reflective(GSMA)film derived from the wings of the glasswing butterfly to enhance the light absorption efficiency of FPSCs.We designed and fabricated the GSMA film with multilayers specifically for FPSCs.The suitable materials and nanostructures to adjust the refractive index are theoretically optimized.The GSMA film effectively improved the optical properties of PSC substrates,reducing reflectance(∼5.01%)and enhancing light transmittance(∼6.17%)in indium tin oxide(ITO)/PEN.In addition,the GSMA film on PEN maintains more than 94.70%of its initial transmittance even after being exposed to various harsh environments for 500 h,and GSMA film demonstrates flexibility by maintaining its initial structure even after a bending test(bending radius of 1 mm).The FPSCs and RPSCs assisted by GSMA film show high short-circuit current density(FPSC:∼25.28 mA/cm^(2),up to 26.05 mA/cm^(2),RPSC:∼24.27 mA/cm^(2))and power conversion efficiency(FPSC:∼22.72%,RPSC:∼22.31%),significantly narrowing the efficiency gap between FPSC and RPSCs.展开更多
The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was demonstrat...The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was demonstrated.Through the use of a novel inversion transfer technique,vertical separation of the binders from the CNTs was induced,rendering a stronger p-doping effect and thereby a higher conductivity of the CNTs.The resulting foldable devices exhibited a power conversion efficiency of 18.11%,which is the highest reported among CNT transparent electrode-based PSCs to date,and withstood more than 10,000 folding cycles at a radius of 0.5 mm,demonstrating unprecedented mechanical stability.Furthermore,solar modules were fabricated using entirely laser scribing processes to assess the potential of the solution-processable nanocarbon electrode.Notably,this is the only one to be processed entirely by the laser scribing process and to be biocompatible as well as eco-friendly among the previously reported nonindium tin oxide-based perovskite solar modules.展开更多
基金supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(2020R1I1A3054824)supported by the Nano&Material Technology Development Program(RS-2023-00282896)through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICT。
文摘Perovskite solar cells(PSCs)have been receiving attention for photovoltaic advantages of high-power conversion efficiency,cost-effectiveness,and easy fabrication process.Particularly,flexible PSCs(FPSCs)are considered to be promising renewable power sources due to the positive potential of flexible and lightweight properties.However,FPSCs tend to have lower efficiency compared to glass-based rigid PSCs(RPSCs).The main issue is high refractive index of polymer substrates such as polyethylene naphthalate(PEN),used for FPSCs,thereby reducing the external light absorption efficiency.In this study,we developed glasswing inspired sticker-type multilayer anti-reflective(GSMA)film derived from the wings of the glasswing butterfly to enhance the light absorption efficiency of FPSCs.We designed and fabricated the GSMA film with multilayers specifically for FPSCs.The suitable materials and nanostructures to adjust the refractive index are theoretically optimized.The GSMA film effectively improved the optical properties of PSC substrates,reducing reflectance(∼5.01%)and enhancing light transmittance(∼6.17%)in indium tin oxide(ITO)/PEN.In addition,the GSMA film on PEN maintains more than 94.70%of its initial transmittance even after being exposed to various harsh environments for 500 h,and GSMA film demonstrates flexibility by maintaining its initial structure even after a bending test(bending radius of 1 mm).The FPSCs and RPSCs assisted by GSMA film show high short-circuit current density(FPSC:∼25.28 mA/cm^(2),up to 26.05 mA/cm^(2),RPSC:∼24.27 mA/cm^(2))and power conversion efficiency(FPSC:∼22.72%,RPSC:∼22.31%),significantly narrowing the efficiency gap between FPSC and RPSCs.
基金supported by the National Research Foundation of Korea funded by the Ministry of Science and ICT (MSIT),Korea (NRF-2021R1C1C1009200 and 2023R1A2C3007358)supported by the Defense Challengeable Future Technology Program of the Agency for Defense Development,Republic of Koreasupported by Technology Innovation Program of the Korea Evaluation Institute of Industrial Technology (KEIT) (20016588)funded by Ministry of Trade,Industry and Energy (MOTIE).
文摘The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was demonstrated.Through the use of a novel inversion transfer technique,vertical separation of the binders from the CNTs was induced,rendering a stronger p-doping effect and thereby a higher conductivity of the CNTs.The resulting foldable devices exhibited a power conversion efficiency of 18.11%,which is the highest reported among CNT transparent electrode-based PSCs to date,and withstood more than 10,000 folding cycles at a radius of 0.5 mm,demonstrating unprecedented mechanical stability.Furthermore,solar modules were fabricated using entirely laser scribing processes to assess the potential of the solution-processable nanocarbon electrode.Notably,this is the only one to be processed entirely by the laser scribing process and to be biocompatible as well as eco-friendly among the previously reported nonindium tin oxide-based perovskite solar modules.
